Visible to near infrared conversion in Ce3+-Yb3+ Co-doped YAG ceramics
In Ce3+–Yb3+ co-doped Y3Al5O12 (YAG) ceramics, possibility of quantum cutting mechanism converting one visible photon into two NIR photons with optimum quantum efficiency approaching 200% have been investigated. In this material, Yb3+ emissions due to the 2F5/2-2F7/2 in the range of 1 μm were observ...
Saved in:
| Published in | Journal of Applied Physics Vol. 106; no. 4; p. 43101 |
|---|---|
| Main Authors | , |
| Format | Journal Article |
| Language | English |
| Published |
American Institute of Physics
17.08.2009
|
| Online Access | Get full text |
| ISSN | 0021-8979 1089-7550 |
| DOI | 10.1063/1.3194310 |
Cover
Loading…
| Summary: | In Ce3+–Yb3+ co-doped Y3Al5O12 (YAG) ceramics, possibility of quantum cutting mechanism converting one visible photon into two NIR photons with optimum quantum efficiency approaching 200% have been investigated. In this material, Yb3+ emissions due to the 2F5/2-2F7/2 in the range of 1 μm were observed upon the excitation of 5d level of Ce3+. In addition, excitation spectra of Yb3+ emission corresponded to that of Ce3+ emission completely. Lifetime of the 5d level of Ce3+ decreased with increasing Yb3+ content. These results indicate the energy transfer (ET) from the 5d levels of Ce3+ to the 5F5/2 level of Yb3+. In (Y0.945Ce0.005Yb0.05) 3Al5O12 sample, the directly measured quantum yield (QY) of Yb3+ emission upon the excitation of 5d level of Ce3+ was about 12% and lower than QY (96%) that estimated from the ET efficiency which was calculated with the measured lifetime of Ce3+. |
|---|---|
| ISSN: | 0021-8979 1089-7550 |
| DOI: | 10.1063/1.3194310 |